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Table 4.10. Mechanical properties
06FBYuAR*TU 14-106-608-2000260–350210 max 32–38For single- and double-layer enamelling 06FBYuAR*TU 14-106-607-2000260–360240 max 32–36For single- and double-layer enamelling 07GFYu TU 14-106-633-2001390 min 275 min 30Steel micro-alloyed with vanadium (0,04–0,08 %) for
automotive parts
360汽车
06FYu TU 14-106-661-2002340 min 240 min 30For cold stamping automotive parts DC01EK EN 10209270–390270 max 30Steel for single- and double-layer enamelling, microalloyed with boron (0,001–0,003 %)
DC04EK EN 10209270–350220 max 36ZStE220BH (HC220B)SEW 094 (EN 10268)320–400 (320–400)220–280 (220–270)30 (32)For forming with subsequent hardening during drying (BH-eff  ect)
ZStE260BH (HC260B)SEW 094 (EN 10268)360–440 (360–440)260–320 (260–320)28 (29)HC260LA (ZStE260)EN 10268 (SEW 093)340–420 (350–450)240–310 (260–340)27 (24)Micro-alloyed steel for cold forming
HC300LA (ZStE300)EN 10268 (SEW 093)370–470 (380–480)280–360 (300–380)24 (22)HC340LA (ZStE340)EN 10268 (SEW 093)400–500 (410–530)320–410 (340–440)22 (20)HC380LA (ZStE380)EN 10268 (SEW 093)430–550 (460–600)360–460 (380–500)20 (18)HC420LA (ZStE420)EN 10268 (SEW 093)460–580 (480–620)400–500 (420–540)18 (16)HC220P ZStE220P EN 10268 SEW 094320–400 340–420220–270 220–28032 30Steel for cold forming microalloyed with phosphorous
HC260P ZStE260P EN 10268 SEW 094360–440 380–460260–320 260–32029 28HC300P ZStE300P EN 10268 SEW 094400–480 420–500300–360 300–36026 26HCT500X (H300X)
EN 10336 (SEW 097)500 min (500 min)300–380 (300–370)23 (24)
Duplex steel for cold forming
HCT600X (H340X)
EN 10336 (SEW 097)
600 min (600 min)
340–420 (340–410)
20 (20)
* — for rolled steel with thickness less than 0.7 mm increase in the yield point value up to 240 N/mm 2 is permissible.
** — for rolled steel with thickness of less than 0.7 mm increase in the yield point value up to 260 N/mm 2 is permissible.*** — for rolled steel with thickness ≤ 0,7 mm and > 0,5 mm decrease in elongation by 2 % is permissible.
4. Cold-rolled carbon steel
4.4. COLD-ROLLED MICRO-ALLOYED STEEL FOR ENAMELLING AND STAMPING
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NOVOLIPETSK STEEL For steel grades HC260LA, HC300LA, HC340LA mandrel diameter during bending test at 180 ° — 0a, for HC380LA, HC420LA — 0.5a, a – strip thickness.
For rolled fl  ats grades HCT500X, HCT600X product mix (0,7–2,0)×(≤1500) mm.For rolled fl  ats grade HC420LA product mix (1,0–2,5)×(≤1300) mm.
For grades DC01EK, DC04EK:
1) mechanical properties apply to skin-passed products only.
2) with thickness of less or equal to 0.7 mm and more than 0.5 mm the yield point value is increased by 20 N/mm 2. With thickness of
less or equal to 0.5 mm the value is increased by 40 N/mm 2.3) yield point lower limit may be assumed as equal to 140 N/mm 2.
4) with thickness of less or equal to 0.7 mm and more than 0.5 mm minimum elongation value is decreased by 2 points. With thick-ness of less or equal to 0.5 mm the minimum value is decreased by 4 points.
5) on customer’s demand rolled steel grade DC04EK may be supplied with yield point not more than 210 N/mm 2 and elongation of
not less than 38 % with 0.7–1.5 mm thickness. Surface roughness in the normal roughness range shall be selected by the manu-facturer.
Rolled steel may be produced with special mechanical properties on demand by customer.
Micro-alloying ensures:
• in steels for enameling — improved resistance to “fi  sh scale” defect.
• in steels for cold stamping of automotive parts — excellent ductility properties in combination with
improved strength
• Rolled steel thickness: 0.5–2.5 mm.
4. Cold-rolled carbon steel
4.4. COLD-ROLLED MICRO-ALLOYED STEEL FOR ENAMELLING AND STAMPING